Create new Calendar.app entry from text date or date and time

Thanks @Sleepy, I removed the date stuff so I can create a new calendar event with the title of whatever is selected.

Keyboard Maestro Actions.kmactions (2.6 KB)

Keyboard Maestro Export

I used PopClip per:

Using the format (without the opening and closing quotes) in a TextEdit doc:
'# popclip
name: calendar
Icon: symbol:calendar
url: kmtrigger://macro=63AF5B8E-E09E-4AC5-A2F1-94E527E67BD5'

I was able to have the SF Symbols icon show in PopClip and trigger the KM macro using its URL as seen in the last line.

Looks like this: